Photographic-printing machine



M. L. cossm, PHOTOGRAPHIC PRINTING MACHINE.

APPLICAT ON FILED JULY 21, 1921.

Patented July 4, 1922.

2 SHEETS-SHEET 1.

UNITED STATES PATENT OFFICE. I

MALCOLIVF L. COSSITT, OF ALAMEDA. CALIFORNIA, ASSIGNOR TO MANIFOLDIMPRESSIONS CORPORATION, OF CARSON CITY, NEVADA, A CORPORATION OFNEVADA.

PHOTOGRAPHIC-PRINTING MACHINE.

Application filed July 21,

To all whom it may concern.

Be it known that I, MALCOLM L. Cossrrr, a citizen of the United States;residing at Alameda, in the county of Alameda and State of California,have invented certain new and useful Improvements inPhotographic-Printing Machines, of which the following is aspecification.

My invention relates to that class of photographic printing machines inwhich the sen-- sitized paper is advanced over and pressed in contactwith a negative lying in the exposure opening of a light box.

The object of my invention is to provide a simple and effective machineof this class, and particularly, in the full development of the device,to provide for such a disposition of the exposed paper, as will enable aroll thereof to be bodily immersed in the developing bath, whereby timeand labor are saved.

To these ends my invention consists in the novel photographic printingmachine which I shall now fully describe by reference to theaccompanying drawings, in which- Fig. l is a side elevation of mymachine.

Fig. 2 is a top plan of the same.

Fig. 3 is an end elevation from the foot end of the machine.

Fig. 1 is a detail view, enlarged, showing the hanging and driving ofthe receiving reel.

Fig. 5 is an elevation of the receiving reel.

Fig. 6 is a detail sectional view of the hanging of said reel.

Fig. 7 is a view showing a modification in the means for advancing thepaper.

1 is a table in the top of which is the usual exposure opening in whichis placed the neg ative, indicated by 2 in Fig. 1. Below the exposureopening is the light box 3. 4 is a reel mounted at one end of the table,which carries the roll of sensitized paper 5, which is drawn forwardover the table top and over the negative 2 lying in the exposureopening.

6 is the contact pad adapted to effect the proper pressure of the paperuponthe negative.

7 is a reel at the other end of the table. upon which the the paper.after being exposed, is wound.

8 is a bracket, overlying the table. and carrying the contact pad, whichis fitted thereto by a set-screw 9. The bracket 8 has s1 tie arms 10carrying pins 11 which slidably Specification of Letters Patent.

Patented July 4, 1922. 1921. Serial No. 486,644.

fit in guides 12 on the table top. The pins 11 are fitted with springs12 within the guides 12, said springs being arranged to pull the pinsand bracket down, Fig. 1. The bracket has also a pair of legs 13 passingvertically down beyond and guided by the end of the table, said 'legsbeing provided with racks 14. ()n the foot of each leg is a roller15Fig. 3.

Mounted on the table is a shaft 16 which carries the cams 17, one foreach rack-leg roller 15, as seen in Fig. 3. The shaft 16 is driven by amotor 18 through the interven tion of a pinion 18 and gear 19. Thus thebracket 8 has imparted to it by means of the cams 17 and the springs 12a vertically reciprocative movement in order to carry the pad 6 into andout of contact with the sensitized paper. The paper-receiving reel 7 iscarried by its shaft 20 in bearings 21 of the table extensions 22. SeeFigs. 4, 5 and 6. Swinging latch members 21' of the bearings 21. providefor the ready insertion and removal of the reel, Figs. 4 and 6. Each endof the reel shaft 20 carries a ratchetclutch member 23. On thetable-legs are mounted fixed journal pins 24, upon which are rotatablyand slidably mounted the complemental ratchet-clutch members 25, whichengage the ratchet-clutch members 23 in one direction and slip them inthe other direction. Springs 26 control the ratchet-clutch members 25.and each of said members carries a pinion 27 which engages with the racklegs 13 of the bracket 8.

It will thus be seen that as the rack legs 13 move down, in order tocarry the contact pad 6 down upon the paper, said legs. though turningthe pinions 27 will not effect the rotation of the receiving reel 7.because the clutch members 23 and will slip in this direction;wherefore, the reel 7 will be at rest. But when the rack legs move up,thus relieving the paper of the pressure of the contact pad, the clutchmembers, engaging in this direction, will effect the rotation of thereel to wind the paper upon it.

Carried upon a shaft 28 rotatably mounted on the table 1, is a pair ofreels 29-Fig. 3. Upon each of these reels is carried a strip 30 ofmaterial having a transversely corrugated face, as seen in Fig. 1. Thesestrips extend to and are wound up on the reel 7 with the sensitized andexposed paper, lying between the folds of the paper at each end of thewound roll, and serving to space or separate said folds.

The operation of the machine is as follows :By means of the cams 17, thecontour of which is properly predetermined, the contact pad 6 iselevated by the rising racklegs 18 and bracket 8, and at the same time.the freed sensitized paper 5 is drawn forward by the partial rotation ofthe reel 7 moving under the engagement of said rack legs 13 with thepinions 27 of the clutch members 23, 25. The corrugated separator strips30 are also at this time wound up on the reel 7 between the folds of thepaper roll. This forward movementof the paper carries a section of itslength over and upon the negative lying in the exposure opening of thelight box. Then when the cams 17 permit, the descent of the bracket 8,under the action of springs 12' will carry the contact pad 6 down uponand press and hold the paper upon the negative; and, as in thismovement, the clutch members slip, no motion is given the reel 7, thuspermitting the paper to remain at rest. On the upward movement of therack legs, the contact pad is again raised and the paper is wound on thereel together with the separator strips 30. At the completion of thework, the reel 7 carrying the roll of exposed paper and the edgeseparator strips, is removed from its bearings, and the development ofthe paper may be effected by immersing the roll bodily in the developer,which on account of the separation of the folds of the roll reachesfreely and evenly the sensitized surface. In. case, however, it bedesired to simply cut off each exposed section of the paper as itreaches the end of the table, instead of reeling it up into a roll, aslight modification at the delivery end of the machine renders thiseasily accomplished. This I show in Figure 7. In this modification, therotating member for advancing the paper which in the case heretoforedescribed assumed the form of a reel, here is a pair of feed rolls 31connected by gears 32 one of the rolls being ope-rated, as before, bythe rack legs 13. Between the rack legs is carried a knife 33 which asthe rack legs descend cuts off the section of paper previously drawnforward and allows it to pass down upon a receiving table 34.

It will be understood that the printing ed to press the paper upon anegative lying in the exposure opening and to withdraw therefrom; adriving means; and connections operated by said driving means foralternately simultaneously withdrawing the contact pad and advancing thepaper, and simultaneously arresting the paper and returning the pad,said connections comprising a reciprocative bracket carrying the contactpad, rack members associated wit-h said bracket, pinions engaged by therack members, cams operating on said rack members to lift the bracket;springs to return said bracket, and clutch members for intermittentlytransmitting motion to the paper drawing means.

2. A photo-graphic printing machine comprising a table having anexposure opening; means associated with the table for carrying a roll ofsensitized paper; a reel associated with the table for drawing forwardthe paper over the exposure opening and winding the exposed paper into aroll; other rolls associated with the table; separator strips carried bysaid other reels and adapted to wind up on the paper drawing reelbetween the folds of the paper at each side thereof; a recip'rocat-ivecontact pad adapted to press the paper upon a negative lying in the exposure opening and to withdraw therefrom; a driving means; andconnections operated by said driving means for alternatelysimultaneously withdrawing the contact pad and rotating the paperadvancing reel and simultaneously arresting said reel and returning thepad.

In testimony whereof I have signed my name to this specification.

MALCOLM L. COSSITT.

